Hoop-planing machine



(No Model.) 2 Sheets-Sheet Ev G. S. FOSTER.

HOOP PLANING MACHINE.

No. 316,768. Pateted Apr. 28, 1885.

I l I (No Model.) 2 SheetsSheet 2.

G. S. POSTER.

HOOP PLANING MAOHINEL No. 316,768. Patented Apr. 28, 1885.

Mhiesses.

Unrrnn tries.

GILBERT S. FOSTER, OF CONCORD, NElV HAMPSHIRE.

HOOP-PLANING MACHINE.

EPECIFICATION forming part of Letters Patent No. 316,768, dated April 28, 1885.

Application filed February 28, 1895.

(No model.)

Be it known that I, GILBERT S. FOSTER, a citizen of the United States, residing at Concord, in the county of Merrimac and State of New Hampshire, have invented certain new and useful Improvements in Hoop -Planing Machines, of which the following is a specification.

My improvements consist, first, in the peculiar form and construction of the pressurebar, whereby it'is both rigid and vertically adjustable upon the frame; second, in locating the main pressure-roll over the highest point of the pressure'bar; third, in the adjustability of both feed and pressure rolls; and, fourth, in the adjustable spring-tension operating upon the pressure-rolls.

In the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in both views, Figure 1 represents an end sect-ional elevation, and Fig. 2 is a sectional elevation, of the frame taken vertically through the j ournal-boxes of the front feed and pressure rolls, or, in other words, the rolls which in Fig. 1 are seen at the left of the cutterhead, showing rolls, screws, and springs in elevation.

The uprights A are connected by suitable ornamental bars, B, provided at either end with studs 13, which enter and pass through holes in said uprights, to which are threaded the nuts b. The top frame, composed of the end pieces,O, connected by similar ornamental bars, D, provided with studs D and nuts (2, is hinged at X to the uprights A.

In the top of the uprightsAare formed two rectangular sockets, A, to which are fitted j ournal-boxes E, carrying the fluted feed-rolls E, and by means of the cap-screws 6 these feed-rolls are rendered capable of vertical adjustment, suitable openings, at, being formed in the uprights A for adjusting said screws 6 by an ordinary wrench. Three rectangular sockets, C, are also formed in the bottom of each of the parts 0 of the top frame, to which are fitted the journal-boxes F, which carry the pressure-rolls F. These pressure-rolls are also rendered adjustable vertically by aid of the cap-screws f, which enter and are threaded to aniron plate, Y, secured byscrews to the bottom of the parts 0. (Shown best in Fig. 1.)

In order to prevent the heads of the screws ffrom coming in contact with the tops of the v journal-boxes E, said tops may be concaved, as shown in the drawings, or they may be made enough shorter to clear the said screwheads. Suitable chambers, c, are provided in the parts O, opening from the sockets O, and extending vertically nearly to the top of said parts 0 for the reception of the tension-springs G, which are made spiral, and set over the studs f of the j ournal-boxes F, and are seated thereon.

Upon the top of each of the springs G is placed a follower-plate, H, and if at any time the springs are found to be too weak to exert the necessary force upon the pressure-rolls F, they may be compressed by means of the screws 0, which are threaded to holes formed in the top of the parts 0 and located concentric with the chambers c. The pressure-bar I may be secured by bolts 1 in a vertical position to a slab, J, extending from one to the other of the uprights A, and properly secured thereto, or in place of the slab J, said press ure-bar may be secured near either end thereof to suitable projections formed upon either of the uprights A. The holes for the bolts or screws 1 in said pressure-bar are slightly elongated vertically, and after adjusting it to the required height, by aid of the screws J, said pressurebar may be held rigid by tightening said screws 1.

The pressure-roll, which is shown. resting upon the pressure-bar, will govern the thick ness of hoops to be dressed, and by actual experiment it has been found to do better work when located exactly over the highest point of the arched top of the pressure-bar, as is shown in the drawings, and when the planer is in operation this roll must be raised or set by aid of the screws 1, so as to leave a space between it and said pressure-bar equal to the 5 ICO K from the cutter-head L for sharpening the same, 'or when for any reason it is desirable to clear everything from above the feed-rolls and cutter-head, by loosening the screws M 5 the whole frame carrying the pressure-rolls may be turned back and out of the way by means of the hinges X. (Shown in Fig. 1.)

. This machine has several advantages over other planers of this character, first, by the IO upper and lower adjustment of both the feed and pressure rolls, a hoop may be thrown out of a horizontal line, and consequently turned either up orvdown while passing through the machine, which is oftentimes very desirable I 5 in a machine of this character; second, in loeating the feed and pressure rolls as near as possible to the cutter-head all unnecessary friction is avoided and less power is required to perform a given amount of work; third, by

' '20 the peculiar construction of this machine all liability to clog caused by the gumor oil from the hoops coming in contact with the moving parts or their journals is avoided; and, fourth, by locating the main or center 25 pressure-roll directly over the highest point of the pressure-bar it easily rides all knots and protuberances 011 the bark side of ahoop,

while exerting a continuous pressure upon said hoop and keeping the cutters steadily 0 at their work.

Having thus fully described my invention, 'wha" I claim as new, and desire to secure by Letters Patent of the United States, is

1. In a hoop-planing machine, a pressurebar, located substantially as shown, having 35 slotted openings through which fasteningbolts are passed, and rendered adjustable vertically by means of screws threaded to a part of the frame of said planer and adapted to bear against the bottom of said pressure-bar, 40 in the manner specified.

2. In ahoop-planing machine,the combination, with an adjustable pressure-bar, constructed substantially in the manner described, of a pressure-roll located directly over said 4 5 pressure bar and rendered adjustable by means of a screw threaded to a portion of the frame of said planer adapted to bear against the bottom of each of the journal-boxes carrying said pressure-roll, and means, substan- 5o tially as described, for applying a variable pressure or tension upon the top of said journal-boxes.

In testimony whereof I affix my signature in presence of two witnesses.

GILBERT s. FOSTER Witnesses:

J. B. THURSTON, NATHANIEL E. MARTIN. 

